Log Message:
py-maturin: updated to 1.3.1

1.3.1

* Use external `uniffi-bindgen` if no root package is configured
* Fix wheel filename for GraalPy
* Add unittest skeleton to mixed Python/Rust projects
* Preserve trailing whitespace in new project files
* Fix missing `workspace.members` in sdist
* Don't set `MACOSX_DEPLOYMENT_TARGET` for editable builds by default